Door-check.



UNITED STATES PATEbj T OFFICE..

JAMES WILLIAM REED AND LA ROY CHAPMAN, OF BERWIND, COLORADO.

Doon-CHECK.

Specification of Letters Patent.

Patented Oct. 20, 1908.

To all whom it may concern:

Be it known that we, JAMES W. REED and LA ROY CHAPMAN, citizens of the United States, residing at Berwind,in the county of Las Animas, State of Colorado, have invented a new and useful Door-Check, of which the following is a specification.

This invention relates to door checks.

The object of the invention is to provide an article of this character that shall be simple of construction, efficient and durable in use, and capable of being operated by the door either above or behind the door casing or under the floor, as may be preferred.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of a door check as will be hereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification and in which like characters of reference indicate corresponding parts, Figure 1 is a view in elevation, partly in section, showing the door check beneath the fioor, and connected with the hinge of the door. Fig. 2 is a top plan view, the retracted position of the plunger of the check being indicated by the full lines and its pro jected position in dotted lines. Fig. 3 is a view in front elevation, partly in section, showing more articularly the manner of connecting the c eck with the movable member of the hinge of a door.

Referring to the drawings, D designates a door of any preferred character, F the floor of a room, C one of the door stiles and H the lower hingev of the door. These parts may be of the usual or any preferred construction and, therefore, need no further description.

The novelty of the present invention resides in connecting the movable member of the hinge H of the door with the plunger rod of the checkin such manner as that when the door is opened the piston or plunger will be projected thus to draw into the casing of the check suicient air to act as a cushion to prevent jars When the door is-released and closes.

The check embodies a cylinder l which is provided at or adjacent to its two ends with oppositely-disposed orificed ears 2 through which are passed screws 3 to hold the casing or cylinder secured to the underside of the floor F. In this instance, the forward head 4 of the cylinder is shown as integral therewith, while the rear head 5 is detachable and is provided with a port 6 through which air is drawn into the cylinder on the opening `movement of the door and escapes therefrom on the closingmovement thereof. Arranged within the cylinder is a piston 7 of any preferred construction, and connecting with which is a piston rod Sthat extends outward beyond the head 4 and carries a slotted head 9 which is held rigid with the piston by a pin or bolt 10. Arranged within the cylinder is a coiled spring 11, one end of which bears against the inner face of the piston and the other end against the head 4 of the cylinder. It is designed that this spring shall be of suf ficient strength to cause the automatic closing of the door when released after having been opened and further that the port 6 shall be of such size that while permitting the door rapidly to close, it will at the same time prevent slamming.

One of the features of novelty of the invention resides in the means for projecting the piston against the tension of the spring ll. This consists of a rod l2 one end of which constitutes the pin for the hinge H, and the other end of which projects through an opening in the Iioor and is provided with a crank 13 that extends through the slot 14 of the head 9. The portion of the rod disposed within the terminal knuckles of the movable member of the hinge is held rigidly against turning relatively thereto in any preferred manner, in this instance, by providing the said knuckles with punched teats 15 that cause approximating depressions in the rod and thus hold the latter against turning rela tively to the knuckles.

The advantage secured by having the cylinder disposed beneath the iioor is that it is invisible and will not therefore detract from the appearance of the door with which it cooperates. The only portion of the device that would attract attention is the rod l2, but this is so small as not to be particularly noticeable and at all events will not be unsightly.

I/Vith the arrangement shown it will be seen that when the door is not opened more than one-half the spring, by coacting with the crank 13, will cause the door to close when released, but should the door be open more than one-half then the spring while coacting with the crank will act to throw the door wide open and it will retain this position until it is manually closed.

The improvements herein described while simplle in character, will k'be found thoroug ly efficient 'for the purposes designed and will coact in the presentation of a simple, durable and thoroughly effective form of door check.

What is claimed is z- 1. The combination with a door hinge, of a rod having its u per end rigidly secured to the two termina knuckles of the movable member of the hinge and its lower end provided with a crank7 and a door check embodying a spring-pressed piston having a rod, and a longitudinall)T slotted head carried by the rod and with which the crank engages.

2. The combination with a door hinge, of a rod having one end rigidly secured to the terminal knuckles of the movable member of the hinge and its other end projected through an opening in the Hoor and provided with a crank7 a cylinder secured beneath the floor of a room, a spring-pressed piston arranged within the cylinder, a rod carried by the piston, and a longitudinally slotted head rigid with the rod and with which the crank 2 engages.

In testimony that we claim the foregoing as our own, we have hereto affixed our signatures in the presence of two witnesses.

JAMES l/VILLIAM REED. LA.ROY CHAPMAN. `VVitnesses WM. E. MALTBY, CHAs. E. FINNEY. 

